<template>
  <el-container class="home_container">
    <!--头部区域-->
    <el-header>
      <div class="tarbar">
        <img class="tarbar_img" src="../assets/img/1.jpg" alt="" />
        <span style="margin-left:15px">电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区域-->
    <el-container>
      <!--侧边栏-->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!--侧边栏菜单区域-->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409BFF" unique-opened :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
          <!--一级菜单-->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
            <!--一级菜单的模板区域-->
            <template slot="title">
              <!--图标-->
              <i :class="iconsObj[item.id]"></i>
              <!--文本-->
              <span>{{ item.authName }}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
              <!--二级菜单的模板区域-->
              <template slot="title">
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span>{{ subItem.authName }}</span>
              </template></el-menu-item
            >
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右侧内容主体-->
      <el-main>
        <!--路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      //左侧菜单数据
      menuList: [],
      //图标对象
      iconsObj: {
        '125': 'iconfont icon-lunkuohua2_yonghu',
        '103': 'iconfont icon-quanxian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-dingdan',
        '145': 'iconfont icon-shuju'
      },
      //是否展开菜单
      isCollapse: false,
      //被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    //点击按钮，切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped>
.home_container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
}

.tarbar {
  display: flex;
  align-items: center;
}

.tarbar_img {
  height: 60px;
}

.el-aside {
  background-color: #333744;
}

.el-menu {
  border-right: none;
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  height: 30px;
  background-color: #4a5064;
  font-size: 15px;
  line-height: 30px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
